Unknown 3CX Critical Fault

We have used 3cx for over a year without issue, however for the second time in a month today for roughly 10 minutes no inbound or outbound calls were possible. While this occurred there was some very unusual log activity. Has anyone seen anything like this?

Did call begin working normally on their own, or did you have to re-boot?

Have you spoken to your voice provider or ISP, about any problems that they may have been having at the time.
I'm assuming that the Public IP's that you didn't "X" out (you missed one of your own), are your providers.

On the first occasion I rebooted. On this occasion, it fixed itself. We have 2 SIP Trunks from major providers. I think's it's unliekely they'd both have issues at the same time.

Our 3CX PBX is located in our data centre and all our sites are remote. I tried dialing in through DID's on both trunks and it was unresponsive. My thought was a possisble issue with our transit link to the PBX (like a DDOS attack) but I have no record or any network issues.

The odd thing is the "Leg L:0.0[Unknown:]" in the log. Given we were at call 27044, why all of a sudden was it unable to properly log calls?

And then straight after it would log properly, but receive the call and terminate it in the same split second -